667 lines
14 KiB
C
667 lines
14 KiB
C
/*THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
|
|
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
|
|
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
|
|
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
|
|
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
|
|
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
|
|
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
|
|
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
|
|
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
|
|
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
|
|
*/
|
|
/*
|
|
* Changed shorts to ints in parameters.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <conf.h>
|
|
#endif
|
|
|
|
#ifdef RCS
|
|
static char rcsid[] = "$Id: rle.c,v 1.2 2001-01-31 15:17:48 bradleyb Exp $";
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "pstypes.h"
|
|
#include "u_mem.h"
|
|
#include "mono.h"
|
|
|
|
|
|
#include "gr.h"
|
|
#include "grdef.h"
|
|
#include "error.h"
|
|
//#include "key.h"
|
|
#include "rle.h"
|
|
//#define RLE_CODE 0xC0
|
|
//#define NOT_RLE_CODE 63
|
|
|
|
#define RLE_CODE 0xE0
|
|
#define NOT_RLE_CODE 31
|
|
|
|
void rle_expand_texture_sub( grs_bitmap * bmp, grs_bitmap * rle_temp_bitmap_1 );
|
|
|
|
#ifndef NO_ASM
|
|
#ifdef __WATCOMC__
|
|
int gr_rle_decode_asm( ubyte * src, ubyte * dest );
|
|
#pragma aux gr_rle_decode_asm parm [esi] [edi] value [edi] modify exact [eax ebx ecx edx esi edi] = \
|
|
" cld " \
|
|
" xor ecx, ecx " \
|
|
" cld " \
|
|
" jmp NextByte " \
|
|
" " \
|
|
"Unique: " \
|
|
" mov [edi],al " \
|
|
" inc edi " \
|
|
" " \
|
|
"NextByte: " \
|
|
" mov al,[esi] " \
|
|
" inc esi " \
|
|
" " \
|
|
" mov ah, al " \
|
|
" and ah, 0xE0 " \
|
|
" cmp ah, 0xE0 " \
|
|
" jne Unique " \
|
|
" " \
|
|
" mov cl, al " \
|
|
" and cl, 31 " \
|
|
" je done " \
|
|
" " \
|
|
" mov al,[esi] " \
|
|
" inc esi " \
|
|
" mov ah, al " \
|
|
" shr ecx,1 " \
|
|
" rep stosw " \
|
|
" jnc NextByte " \
|
|
" mov [edi],al " \
|
|
" inc edi " \
|
|
" " \
|
|
" jmp NextByte " \
|
|
" " \
|
|
"done: ";
|
|
|
|
void rle_stosb(char *dest, int len, int color);
|
|
#pragma aux rle_stosb = "cld rep stosb" parm [edi] [ecx] [eax] modify exact [edi ecx];
|
|
#elif defined __GNUC__
|
|
static inline int gr_rle_decode_asm( ubyte * src, ubyte * dest ) {
|
|
register int __ret;
|
|
int dummy;
|
|
__asm__ __volatile__ (
|
|
" cld;"
|
|
" xorl %%ecx, %%ecx;"
|
|
" jmp 1f;"
|
|
"0:;"
|
|
" movb %%al,(%%edi);"
|
|
" incl %%edi;"
|
|
"1:;"
|
|
" movb (%%esi), %%al;"
|
|
" incl %%esi;"
|
|
" movb %%al, %%ah;"
|
|
" andb $0xE0, %%ah;"
|
|
" cmpb $0xE0, %%ah;"
|
|
" jne 0b;"
|
|
" movb %%al, %%cl;"
|
|
" andb $31, %%cl;"
|
|
" je 2f;"
|
|
" movb (%%esi), %%al;"
|
|
" incl %%esi;"
|
|
" movb %%al, %%ah;"
|
|
" shrl $1, %%ecx;"
|
|
" rep; stosw;"
|
|
" jnc 1b;"
|
|
" movb %%al, (%%edi);"
|
|
" incl %%edi;"
|
|
" jmp 1b;"
|
|
"2:"
|
|
: "=D" (__ret), "=S" (dummy) : "1" (src), "D" (dest) : "%eax", "%ecx");
|
|
return __ret;
|
|
}
|
|
|
|
static inline void rle_stosb(char *dest, int len, int color) {
|
|
int dummy[1];
|
|
__asm__ __volatile__ (
|
|
"cld; rep; stosb"
|
|
: "=D" (dummy[0]), "=c" (dummy[1])
|
|
: "0" (dest), "1" (len), "a" (color) );
|
|
}
|
|
#elif defined _MSC_VER
|
|
__inline int gr_rle_decode_asm( ubyte * src, ubyte * dest )
|
|
{
|
|
int retval;
|
|
__asm {
|
|
mov esi,[src]
|
|
mov edi,[dest]
|
|
xor ecx, ecx
|
|
cld
|
|
jmp NextByte
|
|
Unique:
|
|
mov [edi], al
|
|
inc edi
|
|
NextByte:
|
|
mov al,[esi]
|
|
inc esi
|
|
mov ah, al
|
|
and ah,0xE0
|
|
cmp ah,0xE0
|
|
jne Unique
|
|
|
|
mov cl, al
|
|
and cl, 31
|
|
je done
|
|
|
|
mov al, [esi]
|
|
inc esi
|
|
mov ah, al
|
|
shr ecx, 1
|
|
rep stosw
|
|
jnc NextByte
|
|
mov [edi], al
|
|
inc edi
|
|
jmp NextByte
|
|
done:
|
|
mov [retval],edi
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
__inline void rle_stosb(char *dest, int len, int color)
|
|
{
|
|
__asm {
|
|
mov edi,[dest]
|
|
mov ecx,[len]
|
|
mov eax,[color]
|
|
cld
|
|
rep stosb
|
|
}
|
|
}
|
|
|
|
#else
|
|
# undef NO_ASM
|
|
# define NO_ASM 1
|
|
/* Well, if inline assembler is not supported for this compiler, we don't
|
|
**really** want ASM... */
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef NO_ASM
|
|
void rle_stosb(ubyte *dest, int len, int color)
|
|
{
|
|
int i;
|
|
for (i=0; i<len; i++ )
|
|
*dest++ = color;
|
|
}
|
|
#endif
|
|
|
|
void gr_rle_decode( ubyte * src, ubyte * dest )
|
|
{
|
|
#ifdef NO_ASM
|
|
int i;
|
|
ubyte data, count = 0;
|
|
|
|
while(1) {
|
|
data = *src++;
|
|
if ( (data & RLE_CODE) != RLE_CODE ) {
|
|
*dest++ = data;
|
|
} else {
|
|
count = data & NOT_RLE_CODE;
|
|
if (count==0) return;
|
|
data = *src++;
|
|
for (i=0; i<count; i++ )
|
|
*dest++ = data;
|
|
}
|
|
}
|
|
#else
|
|
gr_rle_decode_asm( src, dest );
|
|
#endif
|
|
}
|
|
|
|
// Given pointer to start of one scanline of rle data, uncompress it to
|
|
// dest, from source pixels x1 to x2.
|
|
void gr_rle_expand_scanline_masked( ubyte *dest, ubyte *src, int x1, int x2 )
|
|
{
|
|
int i = 0;
|
|
ubyte count=0;
|
|
ubyte color=0;
|
|
|
|
if ( x2 < x1 ) return;
|
|
|
|
while ( i < x1 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE)==RLE_CODE ) {
|
|
count = color & (~RLE_CODE);
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
i += count;
|
|
}
|
|
count = i - x1;
|
|
i = x1;
|
|
// we know have '*count' pixels of 'color'.
|
|
|
|
if ( x1+count > x2 ) {
|
|
count = x2-x1+1;
|
|
if ( color != 255 ) rle_stosb( dest, count, color );
|
|
return;
|
|
}
|
|
|
|
if ( color != 255 ) rle_stosb( dest, count, color );
|
|
dest += count;
|
|
i += count;
|
|
|
|
while( i <= x2 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE) == (RLE_CODE) ) {
|
|
count = color & (~RLE_CODE);
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
// we know have '*count' pixels of 'color'.
|
|
if ( i+count <= x2 ) {
|
|
if ( color != 255 )rle_stosb( dest, count, color );
|
|
i += count;
|
|
dest += count;
|
|
} else {
|
|
count = x2-i+1;
|
|
if ( color != 255 )rle_stosb( dest, count, color );
|
|
i += count;
|
|
dest += count;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
void gr_rle_expand_scanline( ubyte *dest, ubyte *src, int x1, int x2 )
|
|
{
|
|
int i = 0;
|
|
ubyte count=0;
|
|
ubyte color=0;
|
|
|
|
if ( x2 < x1 ) return;
|
|
|
|
while ( i < x1 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE)==RLE_CODE ) {
|
|
count = color & (~RLE_CODE);
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
i += count;
|
|
}
|
|
count = i - x1;
|
|
i = x1;
|
|
// we know have '*count' pixels of 'color'.
|
|
|
|
if ( x1+count > x2 ) {
|
|
count = x2-x1+1;
|
|
rle_stosb( dest, count, color );
|
|
return;
|
|
}
|
|
|
|
rle_stosb( dest, count, color );
|
|
dest += count;
|
|
i += count;
|
|
|
|
while( i <= x2 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE)==RLE_CODE ) {
|
|
count = color & (~RLE_CODE);
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
// we know have '*count' pixels of 'color'.
|
|
if ( i+count <= x2 ) {
|
|
rle_stosb( dest, count, color );
|
|
i += count;
|
|
dest += count;
|
|
} else {
|
|
count = x2-i+1;
|
|
rle_stosb( dest, count, color );
|
|
i += count;
|
|
dest += count;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int gr_rle_encode( int org_size, ubyte *src, ubyte *dest )
|
|
{
|
|
int i;
|
|
ubyte c, oc;
|
|
ubyte count;
|
|
ubyte *dest_start;
|
|
|
|
dest_start = dest;
|
|
oc = *src++;
|
|
count = 1;
|
|
|
|
for (i=1; i<org_size; i++ ) {
|
|
c = *src++;
|
|
if ( c!=oc ) {
|
|
if ( count ) {
|
|
if ( (count==1) && ((oc & RLE_CODE)!=RLE_CODE) ) {
|
|
*dest++ = oc;
|
|
Assert( oc != RLE_CODE );
|
|
} else {
|
|
count |= RLE_CODE;
|
|
*dest++ = count;
|
|
*dest++ = oc;
|
|
}
|
|
}
|
|
oc = c;
|
|
count = 0;
|
|
}
|
|
count++;
|
|
if ( count == NOT_RLE_CODE ) {
|
|
count |= RLE_CODE;
|
|
*dest++=count;
|
|
*dest++=oc;
|
|
count = 0;
|
|
}
|
|
}
|
|
if (count) {
|
|
if ( (count==1) && ((oc & RLE_CODE)!=RLE_CODE) ) {
|
|
*dest++ = oc;
|
|
Assert( oc != RLE_CODE );
|
|
} else {
|
|
count |= RLE_CODE;
|
|
*dest++ = count;
|
|
*dest++ = oc;
|
|
}
|
|
}
|
|
*dest++ = RLE_CODE;
|
|
|
|
return dest-dest_start;
|
|
}
|
|
|
|
|
|
int gr_rle_getsize( int org_size, ubyte *src )
|
|
{
|
|
int i;
|
|
ubyte c, oc;
|
|
ubyte count;
|
|
int dest_size=0;
|
|
|
|
oc = *src++;
|
|
count = 1;
|
|
|
|
for (i=1; i<org_size; i++ ) {
|
|
c = *src++;
|
|
if ( c!=oc ) {
|
|
if ( count ) {
|
|
if ( (count==1) && ((oc & RLE_CODE)!=RLE_CODE) ) {
|
|
dest_size++;
|
|
} else {
|
|
dest_size++;
|
|
dest_size++;
|
|
}
|
|
}
|
|
oc = c;
|
|
count = 0;
|
|
}
|
|
count++;
|
|
if ( count == NOT_RLE_CODE ) {
|
|
dest_size++;
|
|
dest_size++;
|
|
count = 0;
|
|
}
|
|
}
|
|
if (count) {
|
|
if ( (count==1) && ((oc & RLE_CODE)!=RLE_CODE) ) {
|
|
dest_size++;
|
|
} else {
|
|
dest_size++;
|
|
dest_size++;
|
|
}
|
|
}
|
|
dest_size++;
|
|
|
|
return dest_size;
|
|
}
|
|
|
|
int gr_bitmap_rle_compress( grs_bitmap * bmp )
|
|
{
|
|
int y, d1, d;
|
|
int doffset;
|
|
ubyte *rle_data;
|
|
|
|
rle_data=d_malloc( (bmp->bm_w+1)* bmp->bm_h );
|
|
if (rle_data==NULL) return 0;
|
|
doffset = 4 + bmp->bm_h;
|
|
for (y=0; y<bmp->bm_h; y++ ) {
|
|
d1= gr_rle_getsize( bmp->bm_w, &bmp->bm_data[bmp->bm_w*y] );
|
|
if ( ((doffset+d1) > bmp->bm_w*bmp->bm_h) || (d1 > 255 ) ) {
|
|
d_free(rle_data);
|
|
return 0;
|
|
}
|
|
d = gr_rle_encode( bmp->bm_w, &bmp->bm_data[bmp->bm_w*y], &rle_data[doffset] );
|
|
Assert( d==d1 );
|
|
doffset += d;
|
|
rle_data[y+4] = d;
|
|
}
|
|
//mprintf( 0, "Bitmap of size %dx%d, (%d bytes) went down to %d bytes\n", bmp->bm_w, bmp->bm_h, bmp->bm_h*bmp->bm_w, doffset );
|
|
memcpy( rle_data, &doffset, 4 );
|
|
memcpy( bmp->bm_data, rle_data, doffset );
|
|
d_free(rle_data);
|
|
bmp->bm_flags |= BM_FLAG_RLE;
|
|
return 1;
|
|
}
|
|
|
|
#define MAX_CACHE_BITMAPS 32
|
|
|
|
typedef struct rle_cache_element {
|
|
grs_bitmap * rle_bitmap;
|
|
ubyte * rle_data;
|
|
grs_bitmap * expanded_bitmap;
|
|
int last_used;
|
|
} rle_cache_element;
|
|
|
|
int rle_cache_initialized = 0;
|
|
int rle_counter = 0;
|
|
int rle_next = 0;
|
|
rle_cache_element rle_cache[MAX_CACHE_BITMAPS];
|
|
|
|
int rle_hits = 0;
|
|
int rle_misses = 0;
|
|
|
|
void rle_cache_close(void)
|
|
{
|
|
if (rle_cache_initialized) {
|
|
int i;
|
|
rle_cache_initialized = 0;
|
|
for (i=0; i<MAX_CACHE_BITMAPS; i++ ) {
|
|
gr_free_bitmap(rle_cache[i].expanded_bitmap);
|
|
}
|
|
}
|
|
}
|
|
|
|
void rle_cache_init()
|
|
{
|
|
int i;
|
|
for (i=0; i<MAX_CACHE_BITMAPS; i++ ) {
|
|
rle_cache[i].rle_bitmap = NULL;
|
|
rle_cache[i].expanded_bitmap = gr_create_bitmap( 64, 64 );
|
|
rle_cache[i].last_used = 0;
|
|
Assert( rle_cache[i].expanded_bitmap != NULL );
|
|
}
|
|
rle_cache_initialized = 1;
|
|
atexit( rle_cache_close );
|
|
}
|
|
|
|
void rle_cache_flush()
|
|
{
|
|
int i;
|
|
for (i=0; i<MAX_CACHE_BITMAPS; i++ ) {
|
|
rle_cache[i].rle_bitmap = NULL;
|
|
rle_cache[i].last_used = 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
grs_bitmap * rle_expand_texture( grs_bitmap * bmp )
|
|
{
|
|
int i;
|
|
int lowest_count, lc;
|
|
int least_recently_used;
|
|
|
|
if (!rle_cache_initialized) rle_cache_init();
|
|
|
|
Assert( !(bmp->bm_flags & BM_FLAG_PAGED_OUT) );
|
|
|
|
lc = rle_counter;
|
|
rle_counter++;
|
|
if ( rle_counter < lc ) {
|
|
for (i=0; i<MAX_CACHE_BITMAPS; i++ ) {
|
|
rle_cache[i].rle_bitmap = NULL;
|
|
rle_cache[i].last_used = 0;
|
|
}
|
|
}
|
|
|
|
// if (((rle_counter % 100)==1) && (rle_hits+rle_misses > 0))
|
|
// mprintf(( 0, "RLE-CACHE %d%%, H:%d, M:%d\n", (rle_misses*100)/(rle_hits+rle_misses), rle_hits, rle_misses ));
|
|
|
|
lowest_count = rle_cache[rle_next].last_used;
|
|
least_recently_used = rle_next;
|
|
rle_next++;
|
|
if ( rle_next >= MAX_CACHE_BITMAPS )
|
|
rle_next = 0;
|
|
|
|
for (i=0; i<MAX_CACHE_BITMAPS; i++ ) {
|
|
if (rle_cache[i].rle_bitmap == bmp) {
|
|
rle_hits++;
|
|
rle_cache[i].last_used = rle_counter;
|
|
return rle_cache[i].expanded_bitmap;
|
|
}
|
|
if ( rle_cache[i].last_used < lowest_count ) {
|
|
lowest_count = rle_cache[i].last_used;
|
|
least_recently_used = i;
|
|
}
|
|
}
|
|
rle_misses++;
|
|
rle_expand_texture_sub( bmp, rle_cache[least_recently_used].expanded_bitmap );
|
|
rle_cache[least_recently_used].rle_bitmap = bmp;
|
|
rle_cache[least_recently_used].last_used = rle_counter;
|
|
return rle_cache[least_recently_used].expanded_bitmap;
|
|
}
|
|
|
|
void rle_expand_texture_sub( grs_bitmap * bmp, grs_bitmap * rle_temp_bitmap_1 )
|
|
{
|
|
unsigned char * dbits;
|
|
unsigned char * sbits;
|
|
int i;
|
|
#ifndef NO_ASM
|
|
unsigned char * dbits1;
|
|
#endif
|
|
|
|
#ifdef D1XD3D
|
|
Assert (bmp->iMagic == BM_MAGIC_NUMBER);
|
|
#endif
|
|
|
|
sbits = &bmp->bm_data[4 + 64];
|
|
dbits = rle_temp_bitmap_1->bm_data;
|
|
|
|
rle_temp_bitmap_1->bm_flags = bmp->bm_flags & (~BM_FLAG_RLE);
|
|
|
|
for (i=0; i < 64; i++ ) {
|
|
#ifdef NO_ASM
|
|
gr_rle_decode(sbits,dbits);
|
|
#else
|
|
dbits1=(unsigned char *)gr_rle_decode_asm( sbits, dbits );
|
|
#endif
|
|
sbits += (int)bmp->bm_data[4+i];
|
|
dbits += 64;
|
|
#ifndef NO_ASM
|
|
Assert( dbits == dbits1 ); // Get John, bogus rle data!
|
|
#endif
|
|
}
|
|
#ifdef D1XD3D
|
|
gr_set_bitmap_data (rle_temp_bitmap_1, rle_temp_bitmap_1->bm_data);
|
|
#endif
|
|
}
|
|
|
|
|
|
void gr_rle_expand_scanline_generic( grs_bitmap * dest, int dx, int dy, ubyte *src,
|
|
int x1, int x2, int masked )
|
|
{
|
|
int i = 0, j;
|
|
int count=0;
|
|
ubyte color=0;
|
|
|
|
if ( x2 < x1 ) return;
|
|
|
|
while ( i < x1 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE) == RLE_CODE ) {
|
|
count = color & NOT_RLE_CODE;
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
i += count;
|
|
}
|
|
count = i - x1;
|
|
i = x1;
|
|
// we know have '*count' pixels of 'color'.
|
|
|
|
if ( x1+count > x2 ) {
|
|
count = x2-x1+1;
|
|
if (!masked || color != 255)
|
|
for ( j=0; j<count; j++ )
|
|
gr_bm_pixel( dest, dx++, dy, color );
|
|
return;
|
|
}
|
|
|
|
if (masked && color == 255)
|
|
dx += count;
|
|
else
|
|
for ( j=0; j<count; j++ )
|
|
gr_bm_pixel( dest, dx++, dy, color );
|
|
i += count;
|
|
|
|
while( i <= x2 ) {
|
|
color = *src++;
|
|
if ( color == RLE_CODE ) return;
|
|
if ( (color & RLE_CODE) == RLE_CODE ) {
|
|
count = color & NOT_RLE_CODE;
|
|
color = *src++;
|
|
} else {
|
|
// unique
|
|
count = 1;
|
|
}
|
|
// we know have '*count' pixels of 'color'.
|
|
if ( i+count <= x2 ) {
|
|
if (masked && color == 255)
|
|
dx += count;
|
|
else
|
|
for ( j=0; j<count; j++ )
|
|
gr_bm_pixel( dest, dx++, dy, color );
|
|
i += count;
|
|
} else {
|
|
count = x2-i+1;
|
|
if (masked && color == 255)
|
|
dx += count;
|
|
else
|
|
for ( j=0; j<count; j++ )
|
|
gr_bm_pixel( dest, dx++, dy, color );
|
|
i += count;
|
|
}
|
|
}
|
|
}
|